Apparatus for boring locomotive-cylinders



(No Model.) 3 Sheets-Sheet 1.

D. 0.. SMITH.

APPARATUS FOR BORING LOOOMOTIVE CYLINDERS.

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(No Model.) 3 Sheets-Sheet 2. D. 0. SMITH.

APPARATUS FOR BORING LOGOMOTIVE CYLINDERS. No. 599,265. P gmented Feb.15,1898.

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(No Model.) 3 SheetsSheet 3.

No. 599,265. Patented Feb. 15,1898.

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"m: NORRIS PETERS m, macro-Luna, Wmmsrou n c Nrrnn drains DYONIOIOUSOLIVER SMITH 1 artist rrrcn.

, OF \VHISTLER, ALABAMA.

SPECIFICATION forming part of Letters Patent No. 599,265, dated February15, 1898.

Application filed October 5, 189 7- To aZZ whom it may concern.-

Be it known that I, DYoMoIoUs OLIVER SMITH, a citizen of the UnitedStates, residing at Whistler, in the county of Mobile and State ofAlabama, have invented a new and useful Apparatus for BoringLocomotive-Cylinders, of which the following is a specification.

This invention has for its object to provide a mechanism forsimultaneously boring the cylinders of a locomotive when in position,thereby enabling the work to be performed in about the same timegenerally required for boring each cylinder separately. The appa ratusis constructed with a View of being fitted to the frame of the engineand is adjustable so as to be applied to different-sized engines withincertain limits. Each boring-bar has an independent feed mechanism and isoperated individually from a common shaft, clutches being interposed toadmit of either boring-bar being thrown out of gear, as desired.

For a full understanding of the merits and advantages of the inventionreference is to be had to the accompanying drawings and the followingdescription.

The improvement is susceptible of various changes in the form,proportion, and the minor details of construction without departing fromthe principle or sacrificing any of the advantages thereof, and to afull disclosure of the invention an adaptation thereof is shown in theaccompanying drawings, in which Figure 1 is a top plan view showing theboring mechanism in position, one of the cylinders and the guides forthe boring-bar thereof being in section. Fig. 2 is a side elevation, thenear cylinder being in section. Fig. 3 is an end view. Fig. 4: is adetail View of the saddle and cylinders, showing the relation of theboring-bars and the mountings there for. Fig. 5 is a detail view of thepowerdriven shaft for operating the boring-bars by means of intermediategearing. Fig. 6 is a detail View of the thrust-brace for the powerdrivenshaft. Fig. 7 is a detail view of a boring-bar, the feed-screw therefor,and the feedwheel for connecting them. Fig. Sis a detail View of thefeed-screw, the feed-nut, and the guide yoke to which the feed nuts areclamped. Fig. 9 is a detail view in elevation of a j ournal-bearin gbrace. Fig. 10 is a front view of the part illustrated in Fig. 9. Fig.11

Serial No. 654,131. (No model.)

to in the following description and indicated in the several views ofthe accompanying drawings by the same reference characters.

So much of the engine-frame is illustrated as is nccessaryto show theparts in operative relation, the saddle 1, cylinders'2, pilot-sill 3,and longitudinal bars i being well-known parts of the frame of alocomotive, to which the working parts are fitted in the mannerpresently to be described. The ends of the cylinders are similarlyequipped, having plates 5 bolted thereto, to which yokes 6 areadjustably connected. Journals 7 are secured centrally of the yokes 6and form bearings for the boring-bars 8, which are supplied withboring-tools 9 of ordinary construction. The rear ends of theboring-bars 8 are reduced and threaded, as shown at 10, and receive thefeed-Wheels 11,1110 unted upon the feed-screws 12 and screwed upon thethreaded ends 10 of the boring-bars.

The feed-screws 12 have heads 13 at their inner ends, which are clampedbetween. the threaded ends 10 and the inner or shouldered end of thethreaded opening 14, formed in the hub of each feed-wheel. When it isrequired to independently adjust the boring-bars, the one or the otheror both feed-wheels are loosened and the feed-screws 12 are turned by alathe-dog or other means, thereby advancing or withdrawing theboringbars, as required, after which the wheel-nuts are retightened.Another way for attaining the same result is to throw the boring-barsout of gear by means of the levers 39 and turning the feed-wheelswithout releasing the feed-screws from the boring-bars.

A yoke 15 is located in the rear of the cylinders and has guide-plates16 bolted thereto at its ends, to which are clamped the feednuts 17, bymeans of which the feed-screws are moved longitudinally when turned.Each feed-nut 17 has a threaded portion 18 and a raised portion 19, thelatter entering an open- -ing 20 in the plate 16 and the threadedportion 18 receiving a clamp-nut 21, by means of which the feed-nut issecured to the plate 16.

J ournal-bearing braces or brackets 22 are secured to the ends of thepilot-sill 3 and are strengthened at their upper ends by braces or stays23, interposed between them and the pilot-sill. at the upper ends of thebrackets 22 to receive the power-driven shaft 25, which is formed withor has applied thereto worm-pinions 26, which intermesh with worm-gears27, mounted upon bearings 28, projecting from the brackets 22. Thisshaft 25 is provided at one end with pulleys 29, the one being tight andthe other loose, and to which the driving-belt (not shown) is appliedfor rotating. the shaft 25 when the boring mechanism is in operation.The end thrust of the shaft 25 is sustained by a thrust-brace 30,secured to the upper end of a bracket 22, and this thrustbrace has itsouter end bent, as shown at 31, and a bearing 32 adjustably connectedtherewith, so as to be brought in line with the shaft and allow for anyvariation in the fitting of the parts. I

The worm-gears 27 are loosely mounted upon the journals 28 and have theinner ends of their hubs formed with annular grooves 33, into whichproject the bent ends 34 of clamps 35, bolted to the brackets orjournal-bearing braces 22. By this means the worm-gears are retained inworking position. The outer ends of the worm-gear hubs are formed withhalfclutches 36, which-are engaged by corresponding half-clutches at theinner ends of clutchsleeves 37, slidingly mounted upon the boringbarsand caused to rotate therewith by a feather-and-spline connection orother means commonly resorted to for imparting a rotary motion torelatively-sliding parts. These clutch-sleeves 37 are formed withannular grooves 38, which receive the inner ends of shipper-levers 39, fulcrumed to the wormgears 27, and which provide means for throwingeither one or both of the boring-tools out of action, as required.

When it is required to bore the cylinders of a locomotive-engine, theparts are assembled about as shown and herein described, and theboring-bars are rotated by applying power to the shaft 25. Theboring-tools are automatically advanced by the turning of thefeed-screws clamped to the boring-bars in the manner specified, andshould it become necessary to stop one or the other of the boringtoolsit is thrown out of action by operating the shipper-lever 39corresponding therewith, which disconnects the clutch-sleeve from theworm-gear, as will be readily understood. When the boring-bars are inmesh with the shaft 25, the boring-tools are advanced alike to the work,and if from any cause it be required to retard one of the boring-toolsor advance it more, rapidly than the other the boring-bar carrying suchtool is unshipped from the shaft 25 by means of the lever 39 and isoperated by means of the hand-wheel 11, connected therewith. During thisadj ustment the boringtool does not perform any work, since it is notrotated; but it can be moved rapidly, so as to clear any depression Journal-bearings 2a are provided which may exist in the surface of thecylinder. In this connection it is to be understood that the pitch ofthe thread of the feed-screws 12 is such as to cause the boring-tools tooverlap and make a continuous cut and will depend upon the relativespeed at which the boring-bars are rotated.

A bearing-sleeve 40 is inserted in an enlarged opening in the outer endof each bearing 28 and is what is known as a ball-bearing and admits ofthe boring-bars being centrally disposed within the cylinders andobtaining bearings in the parts 28 and 40 without requiring thepilot-sill to be absolutely at right angles to the axes of thecylinders.

Having thus described the invention, what is claimed as new is 1. Inapparatus for boring engine-cylinders,

the combination of a boring-bar bearing aboring-tool and having an endportion reduced and threaded, a feed-screw having a head at its innerend, and a feed-wheel having the headed portion of the feed-screw fittedin an opening thereof and having the said opening enlarged and threadedto receive the threaded end of the boring-bar upon which it is screwedto clamp the feed-screw thereto, substantially as set forth.

2. In apparatus for boring engine-cylinders, the combination of aboring-bar provided with a boring-tool, a feed-screw having connectionwith the boring-bar, a plate having an opening, a feed-nut mounted uponthe feed-screw and having an enlarged or raised portion fitted into theopening of the aforesaid plate and formed with a threaded extension, anda clamp-nut mounted upon the threaded extension of the feed-nut tosecure the latter to the plate, substantially as set forth.

3. In apparatus for boring the cylinders of a locomotive-engine, thecombination of a pair of boring-bars provided with boringtools,feed-screws having independent connection with the boring-bars, a yoke,plates secured to the ends of the yoke, and feed-nuts mounted upon thefeed-screws and secured to the said plates, substantially as set forth.

4. In apparatus for boring engine-cylinders, the combination of aboring-bar provided with a boring-tool, means for feeding the boringbar,a bearing, a gear-wheel loosely mounted upon the bearing and havingpower applied thereto,a clutch-sleeve mounted upon the boring-bar andcaused to turn therewith by a feather-and-spline connection, and havinga half clutch to engage with a corresponding half-clutch of theaforesaid gear-wheel, and a shipper-bar for throwing the clutch-sleeveinto and out of engagement with the gearwheel, substantially as setforth.

5. In apparatus for boring enginercylinders of locomotives, thecombination of a pair of boring-bars provided with boring-tools,independent feed mechanism applied to the boring-bars, gear-wheelsloosely mounted upon bearings, a power-driven shaft in mesh with thesaid gear-wheels, sleeves mounted upon the boring-bars and having afeather-and" spline connection therewith, and constructed to haveclutched engagement with the afore said gear-wheels, and independentmeans for throwing the clutchsleeves into and out of engagement with thegear-Wheels, substantially as set forth.

(3. The herein-described apparatus for boring the cylinders oflocomotive engines, comprising brackets provided with bearings andsecured to the pilot-sill, wor1n-gears loosely mounted upon bearings ofthe said brackets,

guide-clamps secured to the brackets and having portions enteringannular grooves in the hub ends of the Worm-gears, a powerdriven shaftjournaled in bearings applied to the said brackets and havingworm-pinions intermeshing with the Worm-gears, a thrustbrace applied toan end of the power-driven shaft and secured to one of the aforesaidbrackets, boring-bars, clutclrsleeves mounted upon the boring-bars toturn therewith, inde pendent means for throwing the clutch-sleeves intoand out of engagement with the Wormgears, feed-screws, feed-Wheelsconnecting the feed-screws with the boring-bars, a yoke, plates securedto the yoke, and feed-nuts mounted upon the feed-screws and secured tothe said plates, substantially as set forth.

7. In apparatus for simultaneously boring engine-cylinders, thecombination of boringbars provided With boring-tools, independent feedmechanism applied to each boi'inghai', means for actuating theboring-bars, and a clutch for each boring-bar to throw it into and outof action, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two Witnesses.

DYONIOIOUS OLIVER SMITH.

Witnesses J. D. GURGANUS, BENJ. JOHNSTON.

